@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
    --primary-color: #3a7bd5;
    --primary-gradient: linear-gradient(135deg, #3a7bd5 0%, #3a6073 100%);
    --secondary-color: #2c3e50;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
    --light-color: #ecf0f1;
    --white-color: #ffffff;
    --background-color: #f0f2f5;
    --text-color: #2c3e50;
    --border-radius: 16px;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --transition-speed: 0.4s;
    --input-bg: #fff;
    --input-border: #ccc;
}

[data-theme="dark"] {
    --primary-color: #4a90e2;
    /* Jaśniejszy niebieski */
    --primary-gradient: linear-gradient(135deg, #4a90e2 0%, #005c97 100%);
    /* Dopasowany gradient */
    --secondary-color: #ecf0f1;
    /* Jasny tekst */
    --background-color: #121212;
    /* Bardzo ciemne tło strony */
    --white-color: #1e1e1e;
    /* Ciemne tło kontenera */
    --light-color: #2d3436;
    /* Ciemne tło elementów (np. progress bar) */
    --text-color: #ecf0f1;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --input-bg: #2d3436;
    --input-border: #555;
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: var(--background-color);
    color: var(--text-color);
    padding: 20px;
    box-sizing: border-box;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
    z-index: 1000;
    padding: 5px;
    border-radius: 50%;
    transition: transform 0.3s ease;
}

.theme-toggle:hover {
    transform: rotate(15deg) scale(1.1);
    background-color: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.container {
    width: 100%;
    max-width: 600px;
    background: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    overflow: hidden;
    position: relative;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

/* ... existing code ... */

#answer-input {
    width: 100%;
    padding: 18px;
    font-size: 1.2rem;
    border: 2px solid var(--input-border);
    border-radius: 12px;
    box-sizing: border-box;
    text-align: center;
    margin-top: 20px;
    transition: all 0.3s ease;
    background-color: var(--input-bg);
    color: var(--text-color);
}

.screen {
    padding: 40px;
    box-sizing: border-box;
    display: none;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

.screen.visible {
    display: block;
    opacity: 1;
}

/* --- Ekran startowy --- */
#setup-screen h1 {
    text-align: center;
    color: var(--text-color);
    margin-top: 0;
    font-size: 2.5rem;
}

#chapter-selection {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    margin: 30px 0;
}

.chapter-label {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--light-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
    color: var(--text-color);
}

.chapter-label:hover {
    background-color: var(--background-color);
    filter: brightness(0.95);
}

.chapter-label:hover {
    background-color: #dfe6e9;
}

.chapter-label[data-disabled="true"] {
    cursor: not-allowed;
    opacity: 0.6;
    background-color: #f0f0f0;
}

.chapter-label input {
    margin-right: 15px;
    width: 20px;
    height: 20px;
}

/* --- Ekran quizu --- */
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    gap: 15px;
}

#reset-progress-btn {
    background: none;
    border: 2px solid #bdc3c7;
    color: #7f8c8d;
    padding: 8px 12px;
    font-size: 0.8rem;
    font-weight: 700;
}

#reset-progress-btn:hover {
    background: #ecf0f1;
    border-color: #95a5a6;
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background-color: var(--light-color);
    border-radius: 6px;
    overflow: hidden;
}

#progress-bar {
    width: 0%;
    height: 100%;
    background: var(--primary-gradient);
    transition: width 0.5s ease;
}

#polish-word {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 30px 0;
    text-align: center;
}

#answer-input {
    width: 100%;
    padding: 18px;
    font-size: 1.2rem;
    border: 2px solid #ccc;
    border-radius: 12px;
    box-sizing: border-box;
    text-align: center;
    margin-top: 20px;
    transition: all 0.3s ease;
}

#answer-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(58, 123, 213, 0.2);
}

#answer-input.input-correct {
    border-color: var(--success-color);
    background-color: #f0fff4;
}

#answer-input.input-incorrect {
    border-color: var(--error-color);
    background-color: #fff0f0;
}

#feedback {
    min-height: 50px;
    margin-top: 25px;
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
}

.feedback-correct {
    color: var(--success-color);
}

.feedback-incorrect {
    color: var(--error-color);
}

.feedback-info {
    color: #555;
}

/* --- Przyciski --- */
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px 20px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#start-btn {
    width: 100%;
    color: var(--white-color);
    background: var(--primary-gradient);
    box-shadow: 0 4px 15px rgba(58, 123, 213, 0.3);
}

#start-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(58, 123, 213, 0.4);
}

.button-group {
    margin-top: 20px;
    display: flex;
    gap: 15px;
}

.button-group button {
    flex-grow: 1;
}

#check-btn {
    color: var(--white-color);
    background: var(--primary-color);
}

#check-btn:hover:not(:disabled) {
    background: #2980b9;
}

#show-answer-btn {
    color: var(--white-color);
    background: var(--secondary-color);
}

#show-answer-btn:hover:not(:disabled) {
    background: #1c2833;
}

/* --- NOWE STYLE: EKRAN WYNIKÓW --- */
#results-screen {
    text-align: center;
    position: relative;
    overflow: hidden;
}

.results-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 0;
}

.results-subtitle {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 40px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 40px;
}

.stat-item {
    background: var(--light-color);
    padding: 20px;
    border-radius: 12px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-unit {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    margin: 5px 0 0;
    font-weight: 600;
    color: #95a5a6;
    font-size: 0.9rem;
}

#restart-btn {
    background: var(--primary-gradient);
    color: var(--white-color);
    width: 220px;
}

#restart-btn:hover {
    transform: translateY(-2px);
}

/* --- NOWE STYLE: ANIMACJA KONFETTI --- */
#confetti-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: #f1c40f;
    opacity: 0;
    animation: fall 5s ease-in-out forwards;
}

@keyframes fall {
    0% {
        opacity: 1;
        transform: translateY(-50px) rotateZ(0deg);
    }

    100% {
        opacity: 0;
        transform: translateY(100vh) rotateZ(720deg);
    }
}